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- W2024704556 abstract "Abstract The pregnane ester glycoside fraction from Condurango cortex, dried bark of Marsdenia cundurango , has been reinvestigated. Four as yet unknown glycosides of the new aglycone condurangogenin E have been isolated by column chromatography and subsequent HPLC, and named condurangoglycoside (CG) E, E O , E 2 and E 3 . The structures of these compounds were established by combination of degradation of sugar chains and spectroscopic means ( 1 H, 13 C NMR, FD-MS). In addition, reinvestigation of the known pregnane ester compounds condurangogenin A, CG A, A O and C by selective proton-decoupling technique in gated decoupled 13 C NMR spectra requires the structural revision of all these and related compounds previously found in Condurango cortex. Aglycones of A, B, C, D and E series thus are esterified with acetic acid at the 11α-hydroxy group and with cinnamic acid at the 12β-hydroxy group ofthe steroid skeleton." @default.
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- W2024704556 date "1988-01-01" @default.
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- W2024704556 title "Structural revision of pregnane ester glycosides from condurango cortex and new compounds" @default.
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- W2024704556 doi "https://doi.org/10.1016/0031-9422(88)80214-0" @default.
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